/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.util;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import junit.framework.TestCase;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Random;
public class Base64Test extends TestCase {
private static final String TAG = "Base64Test";
/** Decodes a string, returning a string. */
private String decodeString(String in) throws Exception {
byte[] out = Base64.decode(in, 0);
return new String(out);
}
/**
* Encodes the string 'in' using 'flags'. Asserts that decoding
* gives the same string. Returns the encoded string.
*/
private String encodeToString(String in, int flags) throws Exception {
String b64 = Base64.encodeToString(in.getBytes(), flags);
String dec = decodeString(b64);
assertEquals(in, dec);
return b64;
}
/** Assert that decoding 'in' throws IllegalArgumentException. */
private void assertBad(String in) throws Exception {
try {
byte[] out = Base64.decode(in, 0);
fail("should have failed to decode");
} catch (IllegalArgumentException e) {
}
}
/** Assert that actual equals the first len bytes of expected. */
private void assertEquals(byte[] expected, int len, byte[] actual) {
assertEquals(len, actual.length);
for (int i = 0; i < len; ++i) {
assertEquals(expected[i], actual[i]);
}
}
/** Assert that actual equals the first len bytes of expected. */
private void assertEquals(byte[] expected, int len, byte[] actual, int alen) {
assertEquals(len, alen);
for (int i = 0; i < len; ++i) {
assertEquals(expected[i], actual[i]);
}
}
/** Assert that actual equals the first len bytes of expected. */
private void assertEquals(byte[] expected, byte[] actual) {
assertEquals(expected.length, actual.length);
for (int i = 0; i < expected.length; ++i) {
assertEquals(expected[i], actual[i]);
}
}
public void testDecodeExtraChars() throws Exception {
// padding 0
assertEquals("hello, world", decodeString("aGVsbG8sIHdvcmxk"));
assertBad("aGVsbG8sIHdvcmxk=");
assertBad("aGVsbG8sIHdvcmxk==");
assertBad("aGVsbG8sIHdvcmxk =");
assertBad("aGVsbG8sIHdvcmxk = = ");
assertEquals("hello, world", decodeString(" aGVs bG8s IHdv cmxk "));
assertEquals("hello, world", decodeString(" aGV sbG8 sIHd vcmx k "));
assertEquals("hello, world", decodeString(" aG VsbG 8sIH dvcm xk "));
assertEquals("hello, world", decodeString(" a GVsb G8sI Hdvc mxk "));
assertEquals("hello, world", decodeString(" a G V s b G 8 s I H d v c m x k "));
assertEquals("hello, world", decodeString("_a*G_V*s_b*G_8*s_I*H_d*v_c*m_x*k_"));
assertEquals("hello, world", decodeString("aGVsbG8sIHdvcmxk"));
// padding 1
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPyE="));
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPyE"));
assertBad("aGVsbG8sIHdvcmxkPyE==");
assertBad("aGVsbG8sIHdvcmxkPyE ==");
assertBad("aGVsbG8sIHdvcmxkPyE = = ");
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E="));
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E"));
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E ="));
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E "));
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E = "));
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E "));
// padding 2
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkLg=="));
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkLg"));
assertBad("aGVsbG8sIHdvcmxkLg=");
assertBad("aGVsbG8sIHdvcmxkLg =");
assertBad("aGVsbG8sIHdvcmxkLg = ");
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g=="));
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g"));
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g =="));
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g "));
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g = = "));
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g "));
}
private static final byte[] BYTES = { (byte) 0xff, (byte) 0xee, (byte) 0xdd,
(byte) 0xcc, (byte) 0xbb, (byte) 0xaa,
(byte) 0x99, (byte) 0x88, (byte) 0x77 };
public void testBinaryDecode() throws Exception {
assertEquals(BYTES, 0, Base64.decode("", 0));
assertEquals(BYTES, 1, Base64.decode("/w==", 0));
assertEquals(BYTES, 2, Base64.decode("/+4=", 0));
assertEquals(BYTES, 3, Base64.decode("/+7d", 0));
assertEquals(BYTES, 4, Base64.decode("/+7dzA==", 0));
assertEquals(BYTES, 5, Base64.decode("/+7dzLs=", 0));
assertEquals(BYTES, 6, Base64.decode("/+7dzLuq", 0));
assertEquals(BYTES, 7, Base64.decode("/+7dzLuqmQ==", 0));
assertEquals(BYTES, 8, Base64.decode("/+7dzLuqmYg=", 0));
}
public void testWebSafe() throws Exception {
assertEquals(BYTES, 0, Base64.decode("", Base64.URL_SAFE));
assertEquals(BYTES, 1, Base64.decode("_w==", Base64.URL_SAFE));
assertEquals(BYTES, 2, Base64.decode("_-4=", Base64.URL_SAFE));
assertEquals(BYTES, 3, Base64.decode("_-7d", Base64.URL_SAFE));
assertEquals(BYTES, 4, Base64.decode("_-7dzA==", Base64.URL_SAFE));
assertEquals(BYTES, 5, Base64.decode("_-7dzLs=", Base64.URL_SAFE));
assertEquals(BYTES, 6, Base64.decode("_-7dzLuq", Base64.URL_SAFE));
assertEquals(BYTES, 7, Base64.decode("_-7dzLuqmQ==", Base64.URL_SAFE));
assertEquals(BYTES, 8, Base64.decode("_-7dzLuqmYg=", Base64.URL_SAFE));
assertEquals("", Base64.encodeToString(BYTES, 0, 0, Base64.URL_SAFE));
assertEquals("_w==\n", Base64.encodeToString(BYTES, 0, 1, Base64.URL_SAFE));
assertEquals("_-4=\n", Base64.encodeToString(BYTES, 0, 2, Base64.URL_SAFE));
assertEquals("_-7d\n", Base64.encodeToString(BYTES, 0, 3, Base64.URL_SAFE));
assertEquals("_-7dzA==\n", Base64.encodeToString(BYTES, 0, 4, Base64.URL_SAFE));
assertEquals("_-7dzLs=\n", Base64.encodeToString(BYTES, 0, 5, Base64.URL_SAFE));
assertEquals("_-7dzLuq\n", Base64.encodeToString(BYTES, 0, 6, Base64.URL_SAFE));
assertEquals("_-7dzLuqmQ==\n", Base64.encodeToString(BYTES, 0, 7, Base64.URL_SAFE));
assertEquals("_-7dzLuqmYg=\n", Base64.encodeToString(BYTES, 0, 8, Base64.URL_SAFE));
}
public void testFlags() throws Exception {
assertEquals("YQ==\n", encodeToString("a", 0));
assertEquals("YQ==", encodeToString("a", Base64.NO_WRAP));
assertEquals("YQ\n", encodeToString("a", Base64.NO_PADDING));
assertEquals("YQ", encodeToString("a", Base64.NO_PADDING | Base64.NO_WRAP));
assertEquals("YQ==\r\n", encodeToString("a", Base64.CRLF));
assertEquals("YQ\r\n", encodeToString("a", Base64.CRLF | Base64.NO_PADDING));
assertEquals("YWI=\n", encodeToString("ab", 0));
assertEquals("YWI=", encodeToString("ab", Base64.NO_WRAP));
assertEquals("YWI\n", encodeToString("ab", Base64.NO_PADDING));
assertEquals("YWI", encodeToString("ab", Base64.NO_PADDING | Base64.NO_WRAP));
assertEquals("YWI=\r\n", encodeToString("ab", Base64.CRLF));
assertEquals("YWI\r\n", encodeToString("ab", Base64.CRLF | Base64.NO_PADDING));
assertEquals("YWJj\n", encodeToString("abc", 0));
assertEquals("YWJj", encodeToString("abc", Base64.NO_WRAP));
assertEquals("YWJj\n", encodeToString("abc", Base64.NO_PADDING));
assertEquals("YWJj", encodeToString("abc", Base64.NO_PADDING | Base64.NO_WRAP));
assertEquals("YWJj\r\n", encodeToString("abc", Base64.CRLF));
assertEquals("YWJj\r\n", encodeToString("abc", Base64.CRLF | Base64.NO_PADDING));
assertEquals("YWJjZA==\n", encodeToString("abcd", 0));
assertEquals("YWJjZA==", encodeToString("abcd", Base64.NO_WRAP));
assertEquals("YWJjZA\n", encodeToString("abcd", Base64.NO_PADDING));
assertEquals("YWJjZA", encodeToString("abcd", Base64.NO_PADDING | Base64.NO_WRAP));
assertEquals("YWJjZA==\r\n", encodeToString("abcd", Base64.CRLF));
assertEquals("YWJjZA\r\n", encodeToString("abcd", Base64.CRLF | Base64.NO_PADDING));
}
public void testLineLength() throws Exception {
String in_56 = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd";
String in_57 = in_56 + "e";
String in_58 = in_56 + "ef";
String in_59 = in_56 + "efg";
String in_60 = in_56 + "efgh";
String in_61 = in_56 + "efghi";
String prefix = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXphYmNkZWZnaGlqa2xtbm9wcXJzdHV2d3h5emFi";
String out_56 = prefix + "Y2Q=\n";
String out_57 = prefix + "Y2Rl\n";
String out_58 = prefix + "Y2Rl\nZg==\n";
String out_59 = prefix + "Y2Rl\nZmc=\n";
String out_60 = prefix + "Y2Rl\nZmdo\n";
String out_61 = prefix + "Y2Rl\nZmdoaQ==\n";
// no newline for an empty input array.
assertEquals("", encodeToString("", 0));
assertEquals(out_56, encodeToString(in_56, 0));
assertEquals(out_57, encodeToString(in_57, 0));
assertEquals(out_58, encodeToString(in_58, 0));
assertEquals(out_59, encodeToString(in_59, 0));
assertEquals(out_60, encodeToString(in_60, 0));
assertEquals(out_61, encodeToString(in_61, 0));
assertEquals(out_56.replaceAll("=", ""), encodeToString(in_56, Base64.NO_PADDING));
assertEquals(out_57.replaceAll("=", ""), encodeToString(in_57, Base64.NO_PADDING));
assertEquals(out_58.replaceAll("=", ""), encodeToString(in_58, Base64.NO_PADDING));
assertEquals(out_59.replaceAll("=", ""), encodeToString(in_59, Base64.NO_PADDING));
assertEquals(out_60.replaceAll("=", ""), encodeToString(in_60, Base64.NO_PADDING));
assertEquals(out_61.replaceAll("=", ""), encodeToString(in_61, Base64.NO_PADDING));
assertEquals(out_56.replaceAll("\n", ""), encodeToString(in_56, Base64.NO_WRAP));
assertEquals(out_57.replaceAll("\n", ""), encodeToString(in_57, Base64.NO_WRAP));
assertEquals(out_58.replaceAll("\n", ""), encodeToString(in_58, Base64.NO_WRAP));
assertEquals(out_59.replaceAll("\n", ""), encodeToString(in_59, Base64.NO_WRAP));
assertEquals(out_60.replaceAll("\n", ""), encodeToString(in_60, Base64.NO_WRAP));
assertEquals(out_61.replaceAll("\n", ""), encodeToString(in_61, Base64.NO_WRAP));
}
/**
* Tests that Base64.Encoder.encode() does correct handling of the
* tail for each call.
*
* This test is disabled because while it passes if you can get it
* to run, android's test infrastructure currently doesn't allow
* us to get at package-private members (Base64.Encoder in
* this case).
*/
public void XXXtestEncodeInternal() throws Exception {
byte[] input = { (byte) 0x61, (byte) 0x62, (byte) 0x63 };
byte[] output = new byte[100];
Base64.Encoder encoder = new Base64.Encoder(Base64.NO_PADDING | Base64.NO_WRAP,
output);
encoder.process(input, 0, 3, false);
assertEquals("YWJj".getBytes(), 4, encoder.output, encoder.op);
assertEquals(0, encoder.tailLen);
encoder.process(input, 0, 3, false);
assertEquals("YWJj".getBytes(), 4, encoder.output, encoder.op);
assertEquals(0, encoder.tailLen);
encoder.process(input, 0, 1, false);
assertEquals(0, encoder.op);
assertEquals(1, encoder.tailLen);
encoder.process(input, 0, 1, false);
assertEquals(0, encoder.op);
assertEquals(2, encoder.tailLen);
encoder.process(input, 0, 1, false);
assertEquals("YWFh".getBytes(), 4, encoder.output, encoder.op);
assertEquals(0, encoder.tailLen);
encoder.process(input, 0, 2, false);
assertEquals(0, encoder.op);
assertEquals(2, encoder.tailLen);
encoder.process(input, 0, 2, false);
assertEquals("YWJh".getBytes(), 4, encoder.output, encoder.op);
assertEquals(1, encoder.tailLen);
encoder.process(input, 0, 2, false);
assertEquals("YmFi".getBytes(), 4, encoder.output, encoder.op);
assertEquals(0, encoder.tailLen);
encoder.process(input, 0, 1, true);
assertEquals("YQ".getBytes(), 2, encoder.output, encoder.op);
}
private static final String lipsum =
"Lorem ipsum dolor sit amet, consectetur adipiscing elit. " +
"Quisque congue eleifend odio, eu ornare nulla facilisis eget. " +
"Integer eget elit diam, sit amet laoreet nibh. Quisque enim " +
"urna, pharetra vitae consequat eget, adipiscing eu ante. " +
"Aliquam venenatis arcu nec nibh imperdiet tempor. In id dui " +
"eget lorem aliquam rutrum vel vitae eros. In placerat ornare " +
"pretium. Curabitur non fringilla mi. Fusce ultricies, turpis " +
"eu ultrices suscipit, ligula nisi consectetur eros, dapibus " +
"aliquet dui sapien a turpis. Donec ultricies varius ligula, " +
"ut hendrerit arcu malesuada at. Praesent sed elit pretium " +
"eros luctus gravida. In ac dolor lorem. Cras condimentum " +
"convallis elementum. Phasellus vel felis in nulla ultrices " +
"venenatis. Nam non tortor non orci convallis convallis. " +
"Nam tristique lacinia hendrerit. Pellentesque habitant morbi " +
"tristique senectus et netus et malesuada fames ac turpis " +
"egestas. Vivamus cursus, nibh eu imperdiet porta, magna " +
"ipsum mollis mauris, sit amet fringilla mi nisl eu mi. " +
"Phasellus posuere, leo at ultricies vehicula, massa risus " +
"volutpat sapien, eu tincidunt diam ipsum eget nulla. Cras " +
"molestie dapibus commodo. Ut vel tellus at massa gravida " +
"semper non sed orci.";
public void testInputStream() throws Exception {
int[] flagses = { Base64.DEFAULT,
Base64.NO_PADDING,
Base64.NO_WRAP,
Base64.NO_PADDING | Base64.NO_WRAP,
Base64.CRLF,
Base64.URL_SAFE };
int[] writeLengths = { -10, -5, -1, 0, 1, 1, 2, 2, 3, 10, 100 };
Random rng = new Random(32176L);
// Test input needs to be at least 2048 bytes to fill up the
// read buffer of Base64InputStream.
byte[] plain = (lipsum + lipsum + lipsum + lipsum + lipsum).getBytes();
for (int flags: flagses) {
byte[] encoded = Base64.encode(plain, flags);
ByteArrayInputStream bais;
Base64InputStream b64is;
byte[] actual = new byte[plain.length * 2];
int ap;
int b;
// ----- test decoding ("encoded" -> "plain") -----
// read as much as it will give us in one chunk
bais = new ByteArrayInputStream(encoded);
b64is = new Base64InputStream(bais, flags);
ap = 0;
while ((b = b64is.read(actual, ap, actual.length-ap)) != -1) {
ap += b;
}
assertEquals(actual, ap, plain);
// read individual bytes
bais = new ByteArrayInputStream(encoded);
b64is = new Base64InputStream(bais, flags);
ap = 0;
while ((b = b64is.read()) != -1) {
actual[ap++] = (byte) b;
}
assertEquals(actual, ap, plain);
// mix reads of variously-sized arrays with one-byte reads
bais = new ByteArrayInputStream(encoded);
b64is = new Base64InputStream(bais, flags);
ap = 0;
readloop: while (true) {
int l = writeLengths[rng.nextInt(writeLengths.length)];
if (l >= 0) {
b = b64is.read(actual, ap, l);
if (b == -1) break readloop;
ap += b;
} else {
for (int i = 0; i < -l; ++i) {
if ((b = b64is.read()) == -1) break readloop;
actual[ap++] = (byte) b;
}
}
}
assertEquals(actual, ap, plain);
// ----- test encoding ("plain" -> "encoded") -----
// read as much as it will give us in one chunk
bais = new ByteArrayInputStream(plain);
b64is = new Base64InputStream(bais, flags, true);
ap = 0;
while ((b = b64is.read(actual, ap, actual.length-ap)) != -1) {
ap += b;
}
assertEquals(actual, ap, encoded);
// read individual bytes
bais = new ByteArrayInputStream(plain);
b64is = new Base64InputStream(bais, flags, true);
ap = 0;
while ((b = b64is.read()) != -1) {
actual[ap++] = (byte) b;
}
assertEquals(actual, ap, encoded);
// mix reads of variously-sized arrays with one-byte reads
bais = new ByteArrayInputStream(plain);
b64is = new Base64InputStream(bais, flags, true);
ap = 0;
readloop: while (true) {
int l = writeLengths[rng.nextInt(writeLengths.length)];
if (l >= 0) {
b = b64is.read(actual, ap, l);
if (b == -1) break readloop;
ap += b;
} else {
for (int i = 0; i < -l; ++i) {
if ((b = b64is.read()) == -1) break readloop;
actual[ap++] = (byte) b;
}
}
}
assertEquals(actual, ap, encoded);
}
}
/** http://b/3026478 */
public void testSingleByteReads() throws IOException {
InputStream in = new Base64InputStream(
new ByteArrayInputStream("/v8=".getBytes()), Base64.DEFAULT);
assertEquals(254, in.read());
assertEquals(255, in.read());
}
/**
* Tests that Base64OutputStream produces exactly the same results
* as calling Base64.encode/.decode on an in-memory array.
*/
public void testOutputStream() throws Exception {
int[] flagses = { Base64.DEFAULT,
Base64.NO_PADDING,
Base64.NO_WRAP,
Base64.NO_PADDING | Base64.NO_WRAP,
Base64.CRLF,
Base64.URL_SAFE };
int[] writeLengths = { -10, -5, -1, 0, 1, 1, 2, 2, 3, 10, 100 };
Random rng = new Random(32176L);
// Test input needs to be at least 1024 bytes to test filling
// up the write(int) buffer of Base64OutputStream.
byte[] plain = (lipsum + lipsum).getBytes();
for (int flags: flagses) {
byte[] encoded = Base64.encode(plain, flags);
ByteArrayOutputStream baos;
Base64OutputStream b64os;
byte[] actual;
int p;
// ----- test encoding ("plain" -> "encoded") -----
// one large write(byte[]) of the whole input
baos = new ByteArrayOutputStream();
b64os = new Base64OutputStream(baos, flags);
b64os.write(plain);
b64os.close();
actual = baos.toByteArray();
assertEquals(encoded, actual);
// many calls to write(int)
baos = new ByteArrayOutputStream();
b64os = new Base64OutputStream(baos, flags);
for (int i = 0; i < plain.length; ++i) {
b64os.write(plain[i]);
}
b64os.close();
actual = baos.toByteArray();
assertEquals(encoded, actual);
// intermixed sequences of write(int) with
// write(byte[],int,int) of various lengths.
baos = new ByteArrayOutputStream();
b64os = new Base64OutputStream(baos, flags);
p = 0;
while (p < plain.length) {
int l = writeLengths[rng.nextInt(writeLengths.length)];
l = Math.min(l, plain.length-p);
if (l >= 0) {
b64os.write(plain, p, l);
p += l;
} else {
l = Math.min(-l, plain.length-p);
for (int i = 0; i < l; ++i) {
b64os.write(plain[p+i]);
}
p += l;
}
}
b64os.close();
actual = baos.toByteArray();
assertEquals(encoded, actual);
// ----- test decoding ("encoded" -> "plain") -----
// one large write(byte[]) of the whole input
baos = new ByteArrayOutputStream();
b64os = new Base64OutputStream(baos, flags, false);
b64os.write(encoded);
b64os.close();
actual = baos.toByteArray();
assertEquals(plain, actual);
// many calls to write(int)
baos = new ByteArrayOutputStream();
b64os = new Base64OutputStream(baos, flags, false);
for (int i = 0; i < encoded.length; ++i) {
b64os.write(encoded[i]);
}
b64os.close();
actual = baos.toByteArray();
assertEquals(plain, actual);
// intermixed sequences of write(int) with
// write(byte[],int,int) of various lengths.
baos = new ByteArrayOutputStream();
b64os = new Base64OutputStream(baos, flags, false);
p = 0;
while (p < encoded.length) {
int l = writeLengths[rng.nextInt(writeLengths.length)];
l = Math.min(l, encoded.length-p);
if (l >= 0) {
b64os.write(encoded, p, l);
p += l;
} else {
l = Math.min(-l, encoded.length-p);
for (int i = 0; i < l; ++i) {
b64os.write(encoded[p+i]);
}
p += l;
}
}
b64os.close();
actual = baos.toByteArray();
assertEquals(plain, actual);
}
}
}
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